feat: retreive templates with contents

Author: r3code

cmd/sendgridman/main.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/sendgrid/rest"
+	sendgrid "github.com/sendgrid/sendgrid-go"
+)
+
+const sendgridHost = "https://api.sendgrid.com"
+
+type sendgridman struct {
+	host   string // a sendgrid service hostname
+	apiKey string // must be exactly 39 symbols
+}
+
+type templateInfo struct {
+	ID       string                `json:"id"`
+	Name     string                `json:"name"`
+	Versions []templateVersionInfo `json:"versions"`
+}
+
+type templateVersionInfo struct {
+	ID         string `json:"id"`
+	TemplateID string `json:"template_id"`
+	Active     uint   `json:"active"`
+	Name       string `json:"name"`
+	UpdatedAt  string `json:"updated_at"`
+	Editor     string `json:"editor"`
+}
+
+// see https://sendgrid.com/docs/API_Reference/Web_API_v3/Transactional_Templates/templates.html#-GET
+type mailTemplate struct {
+	ID       string                `json:"id"`
+	Name     string                `json:"name"`
+	Versions []mailTemplateVersion `json:"versions"`
+}
+
+// see https://sendgrid.com/docs/API_Reference/Web_API_v3/Transactional_Templates/templates.html#-GET
+type mailTemplateVersion struct {
+	templateVersionInfo
+
+	Subject      string `json:"subject"`
+	HTMLContent  string `json:"html_content"`
+	PlainContent string `json:"plain_content"`
+}
+
+// returns a list of dynamic templates descriptions (without a template code and test data)
+func (s sendgridman) getTemplateList() (list []templateInfo, err error) {
+	request := sendgrid.GetRequest(s.apiKey, "/v3/templates", s.host)
+	request.Method = "GET"
+	queryParams := make(map[string]string)
+	queryParams["generations"] = "dynamic" // only dynamic templates
+	request.QueryParams = queryParams
+	response, err := sendgrid.API(request)
+	if err != nil {
+		return list, fmt.Errorf("load templates fail: %w", err)
+	}
+	// TODO: check status code?
+	// fmt.Println(response.StatusCode)
+	// fmt.Println(response.Headers)
+
+	type templateList struct {
+		Templates []templateInfo `json:"templates"`
+	}
+	tl := &templateList{}
+	err = json.Unmarshal([]byte(response.Body), tl)
+	if err != nil {
+		return list, fmt.Errorf("parse templates json fail: %w", err)
+	}
+	return tl.Templates, nil
+
+}
+
+func (s sendgridman) getTemplate(templateID string) (template mailTemplate, err error) {
+	request := sendgrid.GetRequest(s.apiKey, fmt.Sprintf("/v3/templates/%s", templateID), s.host)
+	request.Method = "GET"
+	var response *rest.Response
+	response, err = sendgrid.API(request)
+	if err != nil {
+		return template, fmt.Errorf("load template ID='%s' fail: %w", templateID, err)
+	}
+	// TODO: check status code?
+	// fmt.Println(response.StatusCode)
+	// fmt.Println(response.Headers)
+	err = json.Unmarshal([]byte(response.Body), &template)
+	if err != nil {
+		return template, fmt.Errorf("parse template ID='%s' fail: %w", templateID, err)
+	}
+	return template, nil
+}
+
+// func printTemplateList()
+
+func main() {
+	var apiKey string
+	flag.StringVar(&apiKey, "apikey", "", "a sendgrid APIKey (not API Key ID!) to access service")
+
+	// if len(apiKey) != 39 {
+	// 	fmt.Println("Error: Invalid apikey len, must be 39 symbols exactly")
+	// 	os.Exit(2)
+	// }
+	flag.Parse()
+	sm := &sendgridman{apiKey: apiKey, host: sendgridHost}
+	tl, err := sm.getTemplateList()
+	if err != nil {
+		fmt.Printf("Error: getTemplateList %s", err.Error())
+		os.Exit(1)
+	}
+	fmt.Printf("Found %d dynamic templates\n", len(tl))
+	fmt.Println("Retreive templates data")
+	for i, tplInfo := range tl {
+		var tpl mailTemplate
+		tpl, err = sm.getTemplate(tplInfo.ID)
+		if err != nil {
+			fmt.Printf("Error: failed to retreive template data ID=%s, %s", tplInfo.ID, err.Error())
+			os.Exit(1)
+		}
+		fmt.Printf("%d. Template ID=%s\n %+v\n\n", i, tplInfo.ID, tpl)
+	}
+	fmt.Println("Retreive templates data: OK")
+	// fmt.Printf("tpl list %+v\n", tl)
+}

go.mod

@@ -0,0 +1,8 @@
+module github.com/r3code/sendgrid-man
+
+go 1.14
+
+require (
+	github.com/sendgrid/rest v2.4.1+incompatible
+	github.com/sendgrid/sendgrid-go v3.5.0+incompatible
+)

go.sum

@@ -0,0 +1,6 @@
+github.com/sendgrid/rest v1.0.2 h1:xdfALkR1m9eqf41/zEnUmV0fw4b31ZzGZ4Dj5f2/w04=
+github.com/sendgrid/rest v2.4.1+incompatible h1:HDib/5xzQREPq34lN3YMhQtMkdXxS/qLp5G3k9a5++4=
+github.com/sendgrid/rest v2.4.1+incompatible/go.mod h1:kXX7q3jZtJXK5c5qK83bSGMdV6tsOE70KbHoqJls4lE=
+github.com/sendgrid/sendgrid-go v1.2.0 h1:2K3teZdhaPe12ftFyFL4AWDH4QmNPc+sCi6mWFx5+oo=
+github.com/sendgrid/sendgrid-go v3.5.0+incompatible h1:kosbgHyNVYVaqECDYvFVLVD9nvThweBd6xp7vaCT3GI=
+github.com/sendgrid/sendgrid-go v3.5.0+incompatible/go.mod h1:QRQt+LX/NmgVEvmdRw0VT/QgUn499+iza2FnDca9fg8=